Available in 3 gallon, 7 gallon, 15 gallon and 25 gallon sizes. Scientific Name of Adonidia merrillii (ad-o-NID-ee-a mer-RIL-lee-eye). The Christmas Palm Tree is found off the northwest coast of the Philippines and adjacent Malaysia. Typically growing no taller than 30 feet and less than 1 foot in diameter. A moderately fast-grower, these trees prefer full sun but are adaptable to partial shade. The Christmas Palm requires adequate moisture and can tolerate salt spray, but not saline soils. These trees are not particularly freeze-tolerant, though they're known to survive temperatures slightly below freezing. The Christmas Palm are often clumped together in groups of three, or more, and are perfect for modern gardens.